Friday, November 18, 2011

Bitter Cold November 2011 Alaska Temperatures





Bitter Early Winter Cold Temperatures in Alaska

From: US National Weather Service Alaska
Several record low temperatures which were set more than 40 years ago were broken overnight (November 17, 2011) in the Fairbanks area. This includes radio station KJNP in North Pole which bottomed out at 49 below this morning...breaking the previous record of 46 below set back in 1969. Other records from 1969 that were broken this morning include Eielson Air Force Base at 43 below...the Fairbanks Airport with 41 below and the University Experimental Station at 41 below which broke the record set in 1918. Outside of Fairbanks... Manley Hot Springs reported a bone chilling temperature of 54 below which broke the previous low of 51 below set in 1956 and is the first time temperatures have been colder than 50 below this season in Alaska! For the complete list of temperatures from the report, visit [ https://nwschat.weather.gov/p.php?pid=201111172210-PAFG-NOAK49-PNSAFG ] and check then latest forecast for Alaska here: [ http://www.arh.noaa.gov/ ]

Wednesday, November 16, 2011

October 2011 Global Temperatures



Image and data Information from NOAA.

October 2011 Land Temperatures: 2nd Warmest on Record

While the combined land-ocean surface temperature was the 8th warmest on record (out of 132 years of data), land surface temperatures, when analyzed separately, were far above normal. Globally, the average October land surface temperature was second warmest on record, at 1.10°C (1.98°F) above average. On average, land areas across the Northern Hemisphere—where the majority of the Earth's land mass is located—were the warmest on record for the month, at 1.29°C (2.32°F) above the 20th century average. The warmth was especially pronounced across Alaska, Canada, Mongolia, and most of Russia and Europe. This image shows much of central and northern Russia with average temperatures more than 5°C (9°F) above average.
La Niña conditions in the Pacific have cooled ocean surface temperatures when compared to the above normal land temperatures. Globally, the average October sea surface temperature was 13th warmest on record. While it was cooler than normal in the central and eastern Pacific where La Niña conditions are most intense, it was notably warmer than normal across the north central and northwest Pacific, the northeast Atlantic, and portions of the mid-latitude Southern oceans.

Wednesday, November 9, 2011

October 2011 Statewide Temperature Rankings


NOAA: "October 2011 was warmer than average in the United States"

Map: October 2011 Statewide Temperature Rankings.

During October 2011, a persistent upper-level weather pattern brought below-normal temperatures to the southeastern United States and above-normal temperatures from the Southwest, across the northern tier of the United States, and into parts of the Northeast. The average U.S. temperature in October was 55.7 degrees F, 0.9 degrees F above the 1901-2000 long term average

Tuesday, November 8, 2011

November 7, 2011 Lincoln Precipitation Record



A new daily precipitation record for Lincoln, NE, was set on November 7, 2011. The daily precipitation total of 0.80 inches broke the old record which was 0.63 inches set in 1986.


Lincoln's data records extend back to January 1887 (125 years ago).


The photo is from yesterday, November 7, 2011 in Lincoln, NE.


There is a lot of variability in the daily record precipitation amounts during November. The greatest daily precipitation for any day in November is 2.42 inches on November 12. The lowest daily record precipitation for any day in November is only 0.63 inches on November 28.

Sunday, November 6, 2011

Urban Heat Island and Recent Snowfall









On Wednesday November 2, 2011 a frontal system moving through Nebraska produced rain and eventually several hours of light snowfall in Lincoln, NE. The temperature in the city center of Lincoln, NE, remained in the mid to upper 30's and the snow melted on contact with the surface. It was several degrees cooler in the suburban areas of Lincoln, NE and the snowfall accumulated on the grassy surfaces and roofs of the houses. The slush on the suburban streets was also evidence that the street surface was cool enough to start accumulating snowfall.

The main cause of the urban heat island is the modification of the natural land surface. Urban areas have a surface of concrete, asphalt and building all of which retain their heat. The urban environment also produces “waste heat” generated by the energy usage. All of this results in urban areas frequently being warmer than the surrounding suburban areas and especially the surrounding rural area.

The two attached photos were taken minutes apart and show the difference between the city center of Lincoln and the suburban edge. With a temperature of 37 F the snowfall was melting on contact with the surface in the city but with a temperature of 33 F the snowfall was accumulating on the surface in suburban Lincoln.